M. Cinquin

Bio: M. Cinquin is an academic researcher. The author has contributed to research in topics: Ultrasonic testing. The author has an hindex of 2, co-authored 2 publications receiving 13 citations.

Results of the 2005 UT Modelling Benchmark Obtained with the CIVA Software Developed at the CEA

Abstract: The CIVA software developed at the French Atomic Energy Commission for processing and simulating NDT data includes tools for modelling the whole ultrasonic inspection of a component in which virtual defects are positioned. In this paper, Kirchhoff’s approximation and reciprocity principle were applied to predict the reception by the transducer of waves scattered by the defect. Results given and discussed are those obtained for the various problems of the 2005 UT benchmark modelling session. These results concern the echographic responses of side drilled holes and cracks using immersed inspection techniques.

Results of 2006 UT Modeling Benchmark Obtained with CIVA at CEA: Beam Modeling and Flaw Signal Prediction

Abstract: This benchmark is to compare experimental data with results of simulation The experimental setup involves pulse‐echo responses on planar backwall breaking defects using P‐ or SV‐wave contact transducer The interest is to evaluate the influence of a varying slope of the backwall on the corner trap detection CIVA software developed for processing and simulating NDT data is used Comparisons between experiments and simulations of echo‐graphic responses of rectangular defects at different variations of the backwall slope of the block are presented

Inspection of components with irregular surfaces using a conformable ultrasonic phased array

Abstract: A conformable phased array device has been developed for the inspection of components with irregular surface geometry This low‐cost device uses a standard linear phased array coupled to the pipe‐work surface via a water‐filled, low‐loss membrane The membrane coupled device allows rapid scanning of components with irregular surfaces without the need for multiple angled probes and time consuming mechanical scanning Comparison testing between the conformable array and conventional rigid wedge technology demonstrates that internal noise within the membrane coupled device housing degrades inspection performance Further development of the device has been completed, significantly decreasing this noise and improving device performance

Phased Array Inspection of Irregular Surfaces

Abstract: The purpose of this project is to research and develop new conformable phased arrays that allow reliable ultrasonic inspection of components with an irregular surface. Two alternative approaches have been considered: flexible contact arrays in which the array itself conforms to the surface and a membrane device in which a standard array is coupled to the surface via a fluid‐filled membrane. A linear flexible contact phased array was purchased from CEA France and a conformable membrane device was designed and manufactured at Imperial College. Initial investigations were conducted to evaluate both approaches when coupling to test pieces with machined surfaces representative of typical welded pipes without removal of the weld caps. The research incorporated beam modelling using the CEA CIVA software and comparisons with experimental measurements. It is shown that the conformable membrane approach using a standard array transducer is competitive with the bespoke flexible array.

Ultrasonic Phased Array Inspection Simulations of Welded Components at NASA

Abstract: Comprehensive and accurate inspections of welded components have become of increasing importance as NASA develops new hardware such as Ares rocket segments for future exploration missions. Simulation and modeling will play an increased role in the future for nondestructive evaluation in order to better understand the physics of the inspection process and help explain the experimental results. It will also help to prove or disprove the feasibility for an inspection method or inspection scenario, help optimize inspections, and allow to a first approximation limits of detectability. This study presents simulation and experimental results for an ultrasonic phased array inspection of a critical welded structure important for NASA future exploration vehicles.